Pulverizing-machine.



P. R. WILLSON, JR.

PULVERIZING MACHINE.

APPLICATION FILED JULY 15,1905.

Patented Jan. 13, 1914.

Irwa 7410/ @Zifiesses;

TED STATES PATENT OFFICE.

FREEMAN R. WILLSON, JR., OF WORTI-IINGTON, OHIO, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE J EFF-REY MANUFACTURING COMPANY, A CORPORATION OF OHIO.

PfiLVERIZING-MACHiNE.

Specification of Letters Patent.

Patented' Jan. 13, 1914.

Application filed .Tuly 15, 1905. Serial No. 269,862.

To all whom it may concern:

Be it known that L'F'REEMAN R. WILLsQN, Jr., 'a citizen of-the United States, residing at Worthington, in the county of Franklin and-State of Ohio, have invented certain new and useful Improvements in Pulverizing- Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to machines for pulverizing or finely subdividing material, in which are employed a series ofrotating-beaters or hammers mounted upon a horizontal.

shaft. The material after being finely subdivided or pulverized, is carried out of the machine by means of: air currents.

In the drawings, Figure 1 is a rear elevation of azmachine embodying my invention; Fig. 2 is a central vertical section; Fig. 3 is a bottom plan view of the breaking nose;

Fig. 4 is a plan view'of one of the plates that form the grinding or pulverizi'ng surface;

Fig. 5 is across sectional View of the plate shown in Fig. 4. Fig. 6 is an end .view

partly in section of a portion of the apparatus serving to show the-means for adjusting the bearings of the beater shaft.

In the drawings, A represents a horizontal shaft upon which are mounted aseries of spiders or arms B, to which are pivotally connected the hammers or beaters C. These parts, which may be of any usual or preferred construction, are mounted within a inclined duct F.

Gr represents a hopper for containing the material that is to be fed to the beatersf It delivers to a feed-board H, and this in turn, passes the material into one side of the duct F that leads to the pulverizing chamber of the machine. 7 It will be observed that the feed-plate H is so located that the material falls therefrom upon the down-moving hammers, in. other words, the material is fed to the machine in the direction, or substantially the direction, of movement of these hammers or heaters with which it first comes into the hammers or heaters C. In order to increase the disintegrating and pulverizing eificiencyof the grinding surface, the plates K are constructed to have a series of ribs k, produced by forming channels or grooves in the plates. These ribs tend to retard the forward movement of the material, and thus subject it to the action of the, hammers, largely increasing the efficiency of the machine, ascompared with one in which the grinding surface is formed of plates having smooth sur faces. It will be seen by reference to Fig. 4, that theribs are inclined toward-the center of the plate. This tends to force the material toward the center of the machine, and prevents the accumulation hammers or breaking bars is arrested by.

this wall of the breaking nose, whether such material be finely pulverized or still unreduced, and is thereby forced toward the hammers to be again caught by them and further acted upon. It has heretofore been customary to arrange the vertical face of the breaking nose in a plane extending straight across the machine transversely. I have found that better results are obtained if this face is somewhat dished, as represented in Fig. 3, as theinclined portions 1 of the wall tend to force the material caught thereby toward the center of the machine.v

M represents an ai trunk to which is connected any suitable pparatus :for causing a current of air to pass through the same. The trunk M is connected at its lower or inlet end with one side of the duct F leading into the pulve'rizing chamber of the inachine. I prefer that the openin m into the trunk should be adjacent to, an' just in ad vance of, the lower or delivery edge of the feed plate H, so that the material delivered duct F,'one of these openin s being that at .m, and the other being on t e oppositeside of the wall of the duct m and bemg adapted for the admission of material discharged from the 'plate H. The material to be pulverized is delivered from the plate H in a broad stream moving along a path the width of which is substantially the width of the pulverizer casing. The roximity of the impact nose or stop L to t e openin F results 'in the material fallin from sai 'sto also being subjected to the met action of t e air currents. At the same time it will be observed that the pulverized ma erial is taken up by the'air draft at a poin remote from the region in which the grinding action of means of rods Q, that receive their motion from eccentrics R on shaft S. The shaft=S is belted'to a pulley s on the shaft A, re-

accelerated or retarded. 0 represents a slide-valve mounted in the ceivin therefrom a relatively slow motion. In or er to regulate the feed, I support the rear end of the feed-board on a roller T, the shaft of which is supported in slots If so as to be adjustable. By raising or lowering the roller T, the'inclination of the feed-plate may be varied, and the feed accordingly hopper G above the feed-plate. The upper segment of the, grinding surfaceis covered by a plate U curved to fit the outer surface of the grinding plates. In order to permit the. adjustment of the beaters or hammers relative to the grinding or pulverizing surface at the bottom of the machine,"I preferably mount the bearings for the horizontal shaft A so that they are capable of bodily adjustgnentqoward the said grinding surface. This may be done in any suitable way, for instance, as is clearlyshown in Fig. 6

-. by making the bearing wedge-shaped and seating it in a correspondin y shaped seat in the frame. Shims u an 'v are placed upon each side of the bearin so that by removing shims from one si e or the other only the hearing may be shifted horizontally and by removing equal thicknesses (if shims from both sides the bearing may be adjusted vertically;

Ihave in Fig. Q'indicated in dotted lines at a an elongated aperture through the side wall of the machinef Another such a erture is provided on the opposite side of t e ma chine and through these the shaft A extends.

It will be seen t at the shaft can be adjusted up and down within these apertures so as to bring the lower edges of 'the hammers or Y beaters C ipto different ositions relative to the grinding surface. T ese elongated a ertures a also serve as openings through w ich air may enter the interior of the casing or frafnework adjacent to the pulverizing or grinding surface.

The machine may be utilized for grindin' and pulverizing various materials in whic the finely reduced particles may be drawn ofl" or separated from the heavier materials by air currents suchas lime, limestone, coal, minerals and the like.

What I claim is: 1. In a pulverizing machine, the combination of a casing having an interior grinding or pulverizing surface, a setof rotating beaters or hammers mounted in said casing to cooperate with said inding surface, and an inward projecting impact nose or stop for the material arranged substantially parallel to the axis of rotation in planes beyond the end of the pulverizing surface and having the ends of its impact surface dished or inclined toward the central planes of action of, the hammers, substantially as set forth.

I 2. In a'pulverizingmachine the combination of aqcasing provided with an interior grinding or pulverizing surface, a set of retating beaters or hammers, within said casing, to cooperate with the said grinding surface, and an impact nose or stop so located that material willbe driven against it by the action of the hammers, the saidgcasing having an air inlet opening, an air outlet opening through which pulverized material may be. drawn by air currents and a feed opening separate from the air inlet opening for supplying material to the casing, the said im-' pact nose and the said feed opening being in planes intermediate the air inlet opening and the air outlet opening whereby material falling from the said nose and from the said feed opening is subjected to the direct action of the air current passing from the inlet opening to the outlet opening, substantially as set forth. 4

3. In a pulverizing machine, the combination of a rotary hammer mechanism and a casing inclosing said hammer mechani sm and having a grinding surface and a breaking plate adjacent the grinding surface and at a distance from the outer swing of the hammer mechanism, said casing having a feed opening above the hammers and above the breaking plate whereby material falling from the feed opening will be driven by the hammers against the breaking plate, the said casing also having air inlet and air outlet openings separate from the feed opening, the air outlet opening being at the side of the path of the material from the feed opening to the breaking plate opposite to the hammer mechanism, and the air inlet opening-being at the same side of the path as the hammer mechanism, whereby fine material falling from the feed opening or formed at the breaking plate is carried outward away from the hammer mechanism, substantially as set forth.

In testimony whereof I aflix my signature, in presence of two witnesses.

FREEMAN R. WILLSON, JR. Witnesses:

RoB'r. H. PAUSCH, JOEL WEBSTER. 

